Shielded electrical cable for data transmission

Abstract

A highly flexible shielded electrical line for high-frequency data transmission in swivel-mounted display units having two current supply wires ( 20; 21 ) and/or at least two data wires ( 18; 19 ), provides a shielding ( 35 ) of non-insulated metallic cables enclosing the wires ( 18; 19; 20; 21 ), which are stranded and/or bundled or combined in pairs, in their entirety, [the shielding] being covered externally by a conductive non-woven fabric/mesh/mat ( 36 ) electrically contacting the shielding ( 35 ) all around, the conductive non-woven mat finally being encased by an external sheath ( 37 ) made of silicone rubber (FIG. 3 ).

1 . Highly flexible shielded electrical line for high-frequency data transmission in swivel-mounted display units, in particular swivel-mounted LCD devices, having two current supply wires and/or at least two data wires, characterized in that the wires, twisted and/or bundled or gathered in pairs, are all held together by a shielding of non-insulated metallic wires, which externally are covered by a conductive non-woven fabric electrically contacting the entire shielding, and that finally, this conductive non-woven fabric shielding is enclosed by an outer shield made of a silicone rubber. 
   
   
       2 . Electrical line according to  claim 1 , characterized in that the conductive non-woven fabric is a plastic mat impregnated with conductive materials. 
   
   
       3 . Electrical line according to  claim 1 , characterized in that the conductive non-woven fabric is a plastic mat interwoven with metallic threads. 
   
   
       4 . Electrical line according to  claim 1 , characterized in that the conductive non-woven fabric is a plastic mat coated with metal. 
   
   
       5 . Electrical line according to  claim 4 , characterized in that the conductive non-woven fabric is a plastic mat metal-coated on one or both sides by vapor deposition. 
   
   
       6 . Electrical line according to  claim 3  or one of the subsequent claims, characterized in that the metal is aluminum or an aluminum alloy. 
   
   
       7 . Electrical line according to  claim 3  or one of the subsequent claims, characterized in that the metal is silver or a silver alloy. 
   
   
       8 . Electrical line according to  claim 3  or one of the subsequent claims, characterized in that the external conductive non-woven fabric cover of the shielding is a wound tape of the conductive non-woven fabric. 
   
   
       9 . Electrical line according to  claim 1  or one of the subsequent claims, characterized in that the wires, which are twisted and/or bundled or gathered in pairs, are all held together by an insulating non-woven fabric arranged below the wire mesh. 
   
   
       10 . Electrical line according to  claim 1  or one of the subsequent claims, characterized in that the insulation of the data wires is two-layered, with the inner wrapping of the conductor being a stretched and sintered porous tape or a film of non-melt-processable fluorpolymer, and an outer sealed layer of a melt processable fluorpolymer. 
   
   
       11 . Electrical line according to  claim 10 , characterized in that the non-melt-processable fluorpolymer is a polytetrafluorethylene. 
   
   
       12 . Electrical line according to  claim 10 , characterized in that the outer sealed layer is non-positively connected to at least the uppermost tape or film layer of the inner wrapping. 
   
   
       13 . Electrical line according to  claim 1  or one of the subsequent lowing claims, characterized in that the insulation of the current supply wires is made of a melt-processable fluorpolymer. 
   
   
       14 . Electrical line according to  claim 1  or one of the subsequent claims having a central filling strand, around which the single wires or pairs of wires are twisted, characterized in that the filling strand is a stretched and sintered molded strand made of polytetrafluorethylene. 
   
   
       15 . Electrical line according to  claim 14 , characterized in that the stretched and sintered filling strand is a tape made of polytetrafluorethylene twisted into a strand. 
   
   
       16 . Electrical line according to  claim 10  or one of the subsequent claims, characterized in that the ratio of the wall thickness of the tape or film wrapping to the non-positively connected sealed layer is approximately 3:1. 
   
   
       17 . Electrical line according to  claim 1  or one of the subsequent claims, characterized in that the diameter of the current supply wires and the diameter of the data wires is identical, or almost identical. 
   
   
       18 . Electrical wire according to  claim 1  or one of the subsequent claims, characterized in that the current supply cables and the data cables are at the same time twisted together. 
   
   
       19 . Electrical line according to  claim 1  or one of the subsequent claims, characterized in that the outer shield of the line is a hot-temperature vulcanized (HTV) silicone rubber. 
   
   
       20 . Electrical line according to  claim 1  or one of the subsequent claims, characterized in that the outer shield of the line is an LSR (Liquid Silicon Rubber) rubber. 
   
   
       21 . Electrical line according to  claim 1  or one of the subsequent claims, characterized in that in the dynamic state, the shielded electrical line has a high flexibility at temperatures from −50° C. to +180° C. at a data rate to be transmitted of >800 Mbit/sec. 
   
   
       22 . Application of the electrical line according to  claim 1  or one of the subsequent claims for low voltage/highspeed data transmission via copper wires (Low Voltage Differential Signaling).